Algorithm::CheckDigits::M11_008(3pm) User Contributed Perl Documentation Algorithm::CheckDigits::M11_008(3pm)

CheckDigits::M11_008 - compute check digits for VAT Registration Number (DK)

  use Algorithm::CheckDigits;
  $ustid = CheckDigits('ustid_dk');
  if ($ustid->is_valid('13585628')) {
        # do something
  }
  $cn = $ustid->complete('1358562');
  # $cn = '13585628'
  $cd = $ustid->checkdigit('13585628');
  # $cd = '8'
  $bn = $ustid->basenumber('13585628');
  # $bn = '1358562';

ALGORITHM

1.
Beginning left every digit is weighted with 2, 7, 6, 5, 4, 3, 2, 1
2.
The weighted digits are added.
3.
The sum from step 2 is taken modulo 11.
4.
The number is valid if the sum from step 3 is zero (0).

METHODS

Returns true only if $number consists solely of numbers and the sum computed according to the algorithm given above is 0.

Returns false otherwise,

Returns $number if $number is valid according to the algorithm given above.

Return '' otherwise.

Returns $number if $number is valid according to the algorithm given above.

Return '' otherwise.

Returns '' if $number is valid.

Return undef otherwise.

EXPORT

None by default.

Mathias Weidner, "<mamawe@cpan.org>"

perl, CheckDigits, www.pruefziffernberechnung.de,

2022-10-13 perl v5.36.0